#include "circle.h"
#include <iostream>
using namespace std;
Circle::Circle(double R) {
	cout << "constructor" << endl;
	this->R = R;
}
Circle::Circle(Circle& A) {
	cout << "copy constructor" << endl;
	this->R = A.R;
}
double Circle::area()
{
	return PI * R * R;
}
double Circle::girth()
{
	return 2 * PI * R;
}